Question: When did Maule Region have a population of 836141.0?
Paraphrase: What year was the Maule Region's population 836141.0?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q2166 p:P1082 ?s . ?s ps:P1082 ?x filter(contains(?x , '836141.0')) . ?s pq:P585 ?value}